Having been home-schooled, the 23-year-old was close to his family, including his sisters. Vess said he had created the blog as part of a USA government class project.
It was also believed that he and his father, Pat Conditt, purchased a Pflugerville property previous year, now valued at $69,000; he was living in that house, which he was believed to have built with his father, at the time of the incident.
"I don't know what happened, what snapped. I dont know who this person was that did all of this". Black people in the United States get killed by the police for holding a cell phone in their backyard. He then rigged an explosive to a tripwire along a public trail, injuring two young men who crossed it.
But in the process they can also scoop up the locations of other phones, as well as personal data stored on them, said Stephanie Lacambra, a lawyer for the Electronic Frontier Foundation, a digital rights group.
Officials say the 23-year-old Conditt blew himself up in his vehicle overnight as authorities closed in on him. He said the county medical examiner has not finalized the cause of death, but that the bomb caused "significant" injuries.
Conditt was identified after the parcels were intercepted but killed himself before he could be arrested.
A suspected racial motivation for the attacks is still being investigated by police, but was not referenced in the killer's confession. Conditt and his father had purchased the home in a quiet neighborhood known as Old Town, and spent months remodeling it together. He said he hoped the class would help him do that. "Everybody wants and we want answers", Courtney said.
What do we know so far?
When the third bomb wounded a 75-year-old Hispanic woman, investigators wondered whether it was actually intended for a neighbour, Erica Mason, who has the same last name as the slain teenager.
Relatives also wondered whether a family connection played a role: Houses stepfather is friends with Masons grandfather Norman, and both are prominent fixtures in the black community. The appearance allowed authorities to capture Conditt's license plate.More news: Siri can read out hidden notifications on locked iOS 11 iPhones
More news: 'Jayalalithaa refused to go to hospital', claims Sasikala
More news: South Carolina Man Arrested for Sexual Assault and Abuse in Fayette County
About six hours later, police received a call about another suspicious package at a FedEx facility in southeast Austin. It suggested someone with a knowledge of the city and its habits.
Police detained two of his roommates who might know more about why Conditt, who would remain inside when neighbors chatted with his dad, became what authorities characterized as a "serial bomber".
The bomber's two housemates have been questioned and several more people are set to be interviewed by police.
Conditt was not a military veteran, an early theory given the explosives expertise.
"I wish I were sorry but I am not", Conditt said on the recording, according to the Austin American-Statesman, which cited law enforcement sources familiar with his statements.
He struggled with his social life, however, after not attending a regular school. His declared major was business administration, but he did not graduate.
He called Conditt a "deep thinker". "I do not believe that we have someone going around leaving packages like this". Four others have been injured.
The governor addressed the victims of the bombing and said we should never forget them.
Chief Operating Officer David Bronczek said in a note to employees that FedEx was able to give the information to law enforcement "because of our advanced security capabilities and the vigilance of our team members".